Talking-machine



. a motor 5 of any well known type.

" UNTTED sTATEs PATENT OFFICE.

JOSEPH WOLFF, OF BROOKLYN, NEW YORK, ASSIGNOR TO SONORA PHONOGRAPH CORPORATION, A CORPORATION OF NEW YORK.

TALKING-MACHINE.

vSpecification of Letters Patent.

Tol all 'whom it may concern.'

Be it known that I, JOSEPH WoLFF, a sub- .ject of the King of Great Britain and Ireland, and a resident of the borough of Brooklyn, county of Kings, and State of New York, have invented anew and useful Improvement iTalking-Machines, of which the followin is a specilication.

My invention relates to talking machines, and more particularly to the type of such machines in which a record to be reproduced is carried on a disk,- and has for its object to produce a device wherein the purity and sweetness of the reproduced tones will be brought out, objectionable noises such as blasting, scratching, etc., will be eliminated, and the volume of tone reatly increased.

These and further obJectslwill more fully appear in the follow-ing specification and ac'- companying drawings considered together or separately.

I have illustrated one embodiment of my invention in which,

Figure 1 is a top plan view of my invention, the same being inclosed in a cabinet representing an office desk;

Fig. 2 is 4Ia front elevation of the same; and y Fig. 3 is an enlarged sectional view of the tone-arm and a portion of the horn or dif-4 user.

In al1 of the above views, like parts are designated b similar reference characters in all of the gures. v

In all the drawings 1 designates a cabinet built to represent an oiice desk. The cabinet is provided with a hinged top 2, and with drawers orcompartments 3 for storing record disks, needles, tools, etc.

Carried within'the cabinet, and a short distance below the top thereof, is a partition 4, to the under side of which is secu-pld e shaft of the motor 5 projects upward through the partition 4.and carries the usual turn-table 6 to which a record disk may be applied. Thewinding shaft 7 of the motor projects forward so as to be accessible fo winding.

. The cabinet 1 below the top 2 is incased by a front panel 8, end panels 9, 10, and side panels 11, 10a, and Within the compartment so formed is disposed a horn or sound amplifier 12, of great size (not less than fifty inches.

the accompanying drawings inv inches in length). The bell or discharge opening 13 of the amplifier projects through the en d panel 9, and is of a size not less than twenty-four inches square. The diffuser tapers to its rear end 14, where it is upturned as at 15, andextends to a point vimmediately Patented Nov. 11, 1919. I

below'the partition 4. i Atthis point/it has an opening of not less than three inches square. v

At one rear corner of the partition-4, and communicating with the horn 12, is pivoted .a hollow tone-arm 16, which is of extraordinary length, that is, not less than thirty At its free end the tone-arm carries a sound-box or reproducer 17. The bore of the tone-arm is of the same diameter as those of standard size, and increases in a series of steps from the reproducer 17 to a point near that at which it communicates With the sound-amplifier 12, where it abruptly enlarges into a bowl-shaped chamber 18, the diameterof which isapproximately that ofl opening in the small end of the amplifier 12. v

The lower end of the tone-arm is provided with a circular flange which rests in a socket 19 in the partition. The socket is deeper than the thickness of the flange, so as to allow for vertical movement of the tone-arm inthe socket. A plate 20'covers the socket to prevent withdrawal of the tone-arm, if desired.

The lower face of the flange is provided with a tapered, annular flange 21 which rests in a similarly shaped recess 22 in a block 23, which is secured to the underside of the partition A4 and in which the small end of the horn is seated. The block hasan opening 24 permitting communication between the tone-arm and amplifier.

The sound-box, tone-arm and horn are preferably constructed of fibrous material, and I have shown them in the embodiment illustrated as composed of laminated wood,

such as is shown in my co-pending applica- 4tion for patent filed September 1, 1915,

Serial No. 48,492, but I desire -to have it understood Ithat I do not desirel to limit myself to such material, as the parts may be made of paper, metal or any other suitable material.

My invention consists in constructing the tone-arm and horn of great length, and in providing the abrupt enlargement of bowl shape at the outlet end of the tone-arm and in communication with the horn.

A talking machine constructed in accordance with my invention will give a great volume of sound of superior sweetness and purity, and is particularly intended for use in large rooms, such as dining rooms, concert halls, hotel parlors, and the like.

While I have shown the horn or amplifier of rectangular cross-section, I desire to have it understood that the same may be made of any other sha-pe, and its bell may communicate with the outside atmosphere at t-he front, back or bottom of the cabinet, and that the cabinet may be constructed to represent any other article of furniture, such as a table, book case, cigar counter, or cashiers desk.

v.A portion of the top of the cabinet is hinged to form a cover 25, which is shown opened in Fig. 1. This is to permit access to the apparatus for the purpose of changing records, etc.

In accordance with the provisions of the patent statute, I have described the principle of my invention together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that-the apparatus shown is merely illustrative and'that the invention can be carried out in other Ways.

Having now described my invention, what I claim as new and desireto secure by Letters Patent is, as follows:`

1. A tone arm for a talking machine built up of sections, each section being laminated,

y other with an end of each section except the outermost projecting beyond that immediately beneath, whereby is produced a laminated tone arm increasing in diameter step lby step land with each section superposed over that immediately beneath for a distance tol cause ythe tone arm to be made up at all points of the laminations of at least two superposed sections.

2. A tone arm for a talking machine built up of sections, each section being laminated, 4said sections having bores of dili'erent diameters and being superposed one upon the other with an end of each section except the outermost projecting beyond that immediately beneath, whereby is produced a laminated tone arm increasing in diameter step by step.

This specification signed and witnessed this 20th day of April, 1916.

JOSEPH WOLFF. Witnesses: WM. VARIN,

MORTONA. KERNER. 

